A belt apparatus having an endless belt which is wound around and movably driven by a plurality of support rollers. The speed fluctuations of the endless belt due to the variations in thickness of the endless belt are prevented. A driving apparatus for driving the endless belt has a driving roller and an opposite roller facing with each other across the endless belt, and a driving motor for driving the driving roller, the driving roller and the opposite roller being in pressure contact with each other only at both end parts in their axial direction via the endless belt and the pressure contact part forming a plane.

 
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